U.S. patent number 3,604,372 [Application Number 04/763,582] was granted by the patent office on 1971-09-14 for connector for folding table leg.
This patent grant is currently assigned to Samsonite Corporation. Invention is credited to Oscar C. Hewett, Tim M. Uyeda.
United States Patent |
3,604,372 |
Hewett , et al. |
September 14, 1971 |
CONNECTOR FOR FOLDING TABLE LEG
Abstract
A connector for a folding table leg having a base attached to
the frame of a table underneath the top, a bracket secured to the
underside of the base and having a table leg pivotally connected
thereto and a stabilizing strut having one end pivotally secured to
the leg below the bracket connection and the other end having a
lock bar slidably carried in a slot in the bracket. The slot in the
bracket includes an offset socket whereinto the lock bar wedgingly
fits when the table leg is extended, to tightly hold the table leg
in extended position. A spring biases the lock bar into the socket,
but the lock bar may be removed therefrom by finger pressure
against the face of the strut, to cause the table leg to be folded
to a retracted position on the underside of the table.
Inventors: |
Hewett; Oscar C. (Coal Creek
Canyon, CO), Uyeda; Tim M. (South San Gabriel, CA) |
Assignee: |
Samsonite Corporation (Denver,
CO)
|
Family
ID: |
25068248 |
Appl.
No.: |
04/763,582 |
Filed: |
September 30, 1968 |
Current U.S.
Class: |
108/160; 108/91;
108/129 |
Current CPC
Class: |
A47B
3/0916 (20130101) |
Current International
Class: |
A47B
3/00 (20060101); A47B 3/091 (20060101); A47b
003/091 () |
Field of
Search: |
;108/160,125,127,129,131,132,133,126,91 ;248/439,345.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Zugel; Francis K.
Claims
What we claim is:
1. A connector for connecting a folding leg to the underside of a
table, comprising in combination therewith:
means for pivotally mounting the top of said leg on the underside
of said table;
a metallic bracket attached to the underside of the table and
having a depending flange in alignment with the direction of the
leg fold, said flange having a slot adjacent said pivot means;
a metallic strut pivotally connected at one end to the table leg
spaced from the aforesaid pivot means and having a lock bar at the
opposite end slidably carried in said bracket slot;
said bracket slot being offset to form a socket to receive said
lock bar when the table leg is extended, whereby said strut will
hold the table leg in its extended position; and
a nonmetallic pad mounted on the outside of said strut against
which pressure may be exerted to move said lock bar out of said
socket and to minimize damage to adjacent objects when said table
is stored with said leg in folded position.
2. A connector for connecting a folding leg to the underside of a
table formed as a flat, rectangular panel having a reinforcing
tubular frame underneath the panel and about the periphery thereof,
comprising in combination therewith:
a bracket mounted on a baseplate attached to the underside of the
table, said bracket having a depending flange in alignment with the
direction of the leg fold and on which the top of the leg is
pivotally mounted, said flange having a slot adjacent said
pivot;
a strut pivotally connected at one end to the table leg spaced from
the aforesaid pivot and having a lock bar at the opposite end
slidably carried in said bracket slot, said bracket slot being
offset to form a socket extending obtusely thereto to receive said
lock bar when the table leg is extended;
said baseplate being formed as a substantially rectangular member
having outward edges thereof attached to a corner of the said frame
member, and having inner depending flanges whose ends extend to and
are shaped to engage said tubular frame;
said baseplate being provided with a mounting pad to which said
bracket is connected, said pad being inclined to the plane of the
table top, whereby to incline said leg a like amount from a normal
to the plane of the table top, when said leg is in extended
position;
said bracket being a channel-shaped member formed with two parallel
flanges to carry the leg pivot between them and with opposed,
identically oriented slots and sockets, said table leg being
mounted on the pivot between said flanges;
said strut being a channel-shaped member having a central web and
flanges extending from each end thereof to straddle the table leg
at one end and carry said pivot connection to said leg, and at the
opposite end, to carry said lock bar and to straddle the bracket
flanges with said lock bar extending through said slots;
a hairpin-type spring disposed between said bracket flanges, said
spring having a pair of legs engaging said bracket web and a pair
of feet engaging said lock bar with a curl connecting each leg and
the corresponding foot and a concave crotch connecting said pair of
legs for clearing the top of said leg during movement of said leg
between extended and retracted positions;
said lock bar being trapezoidal in cross section, with the narrower
face thereof facing the socket when lying in said slot adjacent to
the socket; and
said socket being tapered to correspond to said cross section of
said lock bar.
Description
This invention relates to tables having folding legs, and more
particularly to the structure and mechanism which connects a
folding leg to a table. Accordingly, the invention will be
hereinafter referred to as a connector for a folding table leg.
An object of the invention is to provide a novel and improved
connector for a folding table leg which is especially suitable for
lightweight tables, such as card tables, and which is adapted to be
secured to the frame of a lightweight table, as at the corners of
the table, in such a manner as to enhance the overall rigidity of
the structure.
Another object of the invention is to provide a novel and improved
connector for connecting a folding leg to a table, which carries a
stabilizing strut of a rugged, solid construction adapted to hold
the leg in a solid, secure manner whenever the leg is extended and
the table is in use, but which may be released by light finger
pressure to permit the leg to be folded against the underside of
the table.
Another object of the invention is to provide, in a novel and
improved connector for a folding table leg, a shiftable strut which
locks to secure the leg in an extended position and which unlocks
to permit the leg to be folded against the underside of the table,
wherein a unique and simplified locking mechanism holds the strut
in a secure and solid position when the leg is extended, yet which
is easily released to permit the leg to be folded against the
underside of the table.
Another object of the invention is to provide a connector for a
folding table leg which is normally hidden from view when the table
is in use.
Another object of the invention is to provide a connector for a
folding leg which is relatively flat in folded position and is
characterized by the absence of protruding parts when the leg is
folded, thereby minimizing storage space and reducing the
possibility of damage to its shipping carton or to adjacent objects
when in storage.
Still another object of the invention is to provide a connector for
a folding table leg which may be folded to a relatively flat
position and which includes a part which is outermost in folded
position and which may be formed of plastic or similar material, to
serve as a cushion to protect adjacent objects.
Other objects of the invention are to provide a connector for a
folding table leg, which is simple, compact, low in cost, neat
appearing, versatile and rugged and durable.
A connector or a folding table leg of the present invention
includes a bracket secured to the underside of the table top at the
position of and to which the upper end of the leg is pivoted, with
a stabilizing strut pivotally connected to the leg and slidably
connected to the bracket. The strut carries a lock bar which is
movable in a slot of the bracket, as in opposed flanges, and this
slot has an offset socket which receives the lock bar when the leg
is in extended position, to hold the leg tightly in extended
position. The lock bar may be shifted from the socket, as by finger
pressure against a nonmetallic pad on the strut, in order to
collapse the leg against the underside of the table. A spring
acting against the lock bar holds the lock bar in the socket, while
the bracket may be mounted on an inclined portion of a base, to
produce an outward inclination of the leg in extended position,
with the base being attached to a depending rim or frame of the
table top.
With the foregoing and other objects in view, the present invention
comprises certain constructions, combinations and arrangements of
parts and elements as hereinafter described and illustrated in
preferred embodiment by the accompanying drawings, in which:
FIG. 1 is a perspective view of a card table of a simple,
neat-appearing design which is ideally suited for using the
improved folding leg connector constituting the present
invention;
FIG. 2 is a fragmentary underside view of one corner of the table
illustrated in FIG. 1, to show a bottom view of the improved
connector and a fragment of the leg extending therefrom, all as
taken from the indicated line 2--2 of FIG. 1, but on an enlarged
scale;
FIG. 3 is a fragmentary sectional view of the table corner and a
longitudinal sectional view of the connector mounted thereon, taken
along line 3--3 of FIG. 2, this view showing the table in an upside
down position with a portion of the leg thereon in its extended
position;
FIG. 4 is a longitudinal sectional view, similar in arrangement to
FIG. 3, but taken through the axis of the leg and connector along
line 4--4 of FIG. 2;
FIG. 5 is a longitudinal sectional view similar to FIG. 4, but
showing the leg as being swung to its retracted position against
the underside of the table;
FIG. 6 is a transverse, sectional view of a base plate of the
connector, taken along line 6--6 of FIG. 2, but on an enlarged
scale, the baseplate being shown in upside down position and broken
lines indicating the outline of the table frame tube to which the
base is attached;
FIG. 7 is a transverse section of a stabilizing strut of the
connector, taken along line 7--7 of FIG. 3 but on a greatly
enlarged scale;
FIG. 8 is a side elevation of a mounting bracket of the connector,
taken in the direction of arrow 8 of FIG. 2 but on an enlarged
scale;
FIG. 9 is a transverse section of the bracket, taken along line
9--9 of FIG. 8;
FIG. 10 is a side elevation of a lock spring of the connector, on
an enlarged scale compared with its showing in FIGS. 4 and 5;
FIG. 11 is a front view of the lock spring illustrated in FIG.
10;
FIG. 12 is an isometric view of a lock bar of the connector, on an
enlarged scale compared with its showing in FIGS. 4 and 5;
FIG. 13 is an end view of the lock bar of FIG. 12;
FIG. 14 is an isometric view, similar to FIG. 12, but illustrating
a modified construction of the lock bar;
FIG. 15 is an end view of the lock bar of FIG. 14, with a portion
of the end being broken away to show details hidden from view;
and
FIG. 16 is a small scale, isometric underside view of the corner of
a table of another type of table construction, showing a modified
form of the connector base.
The present invention was conceived and developed to meet a need
for an improved card table, or any other similar table, which
combines the features of a lightweight, rugged and neat-appearing
table top with folding legs which are rigid when they are extended,
but which may be easily folded to a retracted position underneath
the table. As in FIGS. 1-5, the invention is applied to a leg
connector C mounted on the underside of each corner of a table T,
supported by folding legs L. The connector C includes a baseplate P
attached to a table frame, F, a channellike bracket B depending
from the underside of the base plate P, to which the top of the leg
L is pivotally connected, and an inclined stabilizing strut S
having one end attached to the bracket B and the other end to the
leg. To effect leg folding, the strut is pivotally connected to the
leg and slidably connected to the bracket.
In accordance with this invention, the slidable connection between
the strut and bracket is effected by a transversely disposed
wedging bar attached to the end of the strut, which bar is carried
within slots in opposed sides of the bracket. The slots terminate
in offset, wedge-formed sockets which retain the bar when the leg
is in its extended position. A spring member locks the bar in the
sockets; however, the strut may be pushed, as with finger tip
pressure, to move the bar out of this socket to slide within the
slot to move the leg toward the underside of the table and to its
retracted position, all as will be hereinafter further
described.
Referring more particularly to the drawings, the table T may be a
flat, substantially rectangular or square unit having a top panel
20 of plywood or hardboard, covered by sheeting 21. The panel 20 is
mounted upon the frame F, which is conveniently a metal tube
extending about the peripheral edge of the table, beneath the panel
top. The frame is securely attached to the underside of the top
panel, as by an array of screw attached clips 23, as illustrated in
FIG. 2. Where the tubular frame is a continuous member, formed by
bending the tube at the corners 24, as illustrated, and welding the
abutting ends, the corners of the table panel 20 are also rounded
to correspond with the frame. With this arrangement, the table top
is a neat simple unitary member.
Although the table is illustrated as being rectangular in form,
with rounded corners, it is to be understood that the invention
herein disclosed may be used with tables having other forms, such
as a table formed with sharp corners, as illustrated in FIG. 16, or
even with a rounded table. This is because each leg connector C,
ordinarily located at each corner of the table, may be placed at
appropriate positions around a circular or oval table. Each leg
connector includes a flat base plate P which is welded or otherwise
connected to the frame member. In the preferred construction
illustrated, as in FIGS. 2-6, this baseplate is a metal sheet which
is easily formed in a press. It is essentially square or
rectangular, with its outer edges 25 lying against the inner side
of the frame adjacent to the underside of the panel 21, and with an
outer corner 26, between the outer edges curved to correspond with
the curved frame corner 24. A depending flange 27 extends around
the inner edges of this baseplate, being formed with a cutout 28 at
and adjacent to the inner corner 29, to accommodate the leg L when
in folded position. Each end of flange 27 has a concave edge 30,
which abuts the inside of a tubular frame, when used. Each
baseplate P may be welded in position against the tubular frame, as
along the edges 25, corner 26 and the ends 30, thus being rigidly
secured in position underneath the table top, not only to hold the
corresponding leg, but also to rigidify the entire table.
The bracket B is attached to the underside of the base plate P to
carry a leg L. To facilitate aligning the leg in a position in
which it will be inclined outwardly at a slight outward and
downward angle from a perpendicular to the top of the table, the
bracket B is mounted upon an inclined pad 32 formed in the
undersurface of the base frame 25, at a small angle, offsetting a
portion of the metal constituting the base, as best illustrated in
FIG. 6.
The bracket B is a relatively short, channel-shaped member having a
central web 33, which is mounted upon the pad 32, and having
flanges 34 depending from each side of the web. Holes 35 in the web
33 register with holes 35' in the pad 32, to receive rivets 36
which securely connect the bracket to the pad, as in FIGS. 4 and 5.
The bracket B is aligned upon the baseplate P in the direction in
which the leg L, mounted thereon, is to be swung for retraction,
and this alignment will be substantially parallel to the adjacent
side of the table. The top of the leg L is attached between the
flanges 45 by a pivot pin 37, such as a rivet, at an approximate
inner one-third point of the bracket and extending through holes
37' in these flanges. The leg-supporting portion of the bracket B
is an inset partial collar 38 formed in each side of the bracket,
as by distorting the web and flanges of the bracket, as in FIGS. 8
and 9. The collar 38 provides a snug fit against the sides of the
tubular leg held between the flanges 34, and provides a recess at
each outer side of the flanges to retain the heads at the ends of
the pivot pin 37 within the outer wall contour of the flanges 34.
Ordinarily, the leg L will be formed from thin-walled tubing, and
to minimize wear at pivot pin 37, a reinforcement 39 may be
extruded inwardly from the leg walls at each end of the pivot pin
37.
The leg is held in its extended position by the strut S, at a small
angle outwardly and downwardly from a normal to the table top,
while the leg is held in its retracted position against the
underside of the table top by a wedge projection 40, deformed from
an inner face of the inward corner of a flange 34, as in FIGS. 2, 4
and 8, which snaps over the edge of the leg when it is folded to
its retracted position.
The stabilizing strut S, as in FIGS. 2-4, is formed as a short,
channel-shaped link having an outward web surface 41 and a flange
42 at each side thereof which extends beyond each end of the web
41, as in FIG. 3. The side flanges 42 are spaced apart sufficiently
to embrace the flanges 34 of the bracket B and are connected to the
bracket by a lock bar 43, as hereinafter described. The upper ends
of the flanges 42 extend to and connect with a pivot pin 44 on the
leg, which is spaced a suitably short distance from the bracket
pivot pin 37 at the top of the leg, as in FIG. 4, within
reinforcements 34'. The ends of the strut flanges 42 are narrowed
by offsets 45 to provide a secure fit to the leg, as best
illustrated in FIGS. 2 and 7. The opposite ends of flanges 42 of
the strut extend beyond the web 41 to steady and embrace the
bracket flanges 34, while the transverse lock bar 43 is mounted
between these flange extensions.
The lock bar 43 may be rectangular or approximately trapezoidal in
section, as in FIGS. 12 and 13, with two opposite, inclined sides
46 to provide a tapered, wedge-shaped member. This bar is held in
correspondingly shaped holes 47 in each flange 42 of the strut, and
its length is such as to extend through holes 47 with a projection
at each side sufficient to receive a lock ring 48 to hold the bar
in place, as in FIGS. 2 and 3. The holes 47 are broached to snugly
fit the lock bar 43 and hold the same between the flanges in a
nonrotative position with the narrower face 49 of the lock bar,
between the tapered faces 46, adjacent to the web edge of the
strut.
The lock bar 43, secured to the ends of the strut flanges, moves in
a pair of identical, opposed slots 50 in the bracket flanges 42,
with these slots extending from the outward end of the bracket to
the approximate center thereof and over a reach which is sufficient
to permit the table leg to swing from its extended position, when
the strut is inclined and the lock bar 43 is at the outward end of
the slots, as in FIG. 4, to a retracted position alongside the
underside of the table when the strut is lying flatly upon the
bracket and the lock bar is at the inner end of the slot, as in
FIG. 5.
In accordance with this invention, the outward end of each slot 50,
as in FIG. 8, is offset to extend away from the bracket web and
towards the extended edge of each flange 34 to provide a socket 51
having sides 52. Thus, the socket 51 is offset angularly but
extends in the same direction as slot 50, being inclined obtusely
to the slot 50, with the angle between the centerline of slot 50
and the centerline of socket 51 being greater than 90.degree. but
less than 180.degree., such as about 120.degree., as shown. Socket
51 may be inclined with respect to the edges of the bracket, as in
FIG. 8, sized to correspond with the form of the lock bar 43, with
sides 52 diverging, as shown, so that the socket will be wedge
shaped, although the socket may be rectangular, as indicated above.
In any event, socket 51 will snugly receive and hold the lock bar
when the table leg is extended and the strut is inclined, as in the
manner illustrated in FIG. 4. It is immediately apparent that any
pressure tending to swing the extended table leg either outwardly
or inwardly will cause the faces 46 of the lock bar to press
against the sides of the sockets 51, but with the fit attained by
the lock bar in the sockets, there can be no slack or slop of the
lock bar 45 in the mating sockets 51. Thus, the strut will hold the
leg securely and solidly in its extended position, a few degrees
outwardly from the normal to the table surface.
However, the lock bar 43 may easily be pushed out of the slot
offset 51 by simple pressure against the outward face of the strut
web 41, which will move the free end of the strut S to move the
lock bar out of the offset socket 51 and into the main portion of
the slot 50. A finger pad 53 is provided in the outward web face 41
of the strut, being secured to this face in any suitable manner, as
by hooked fingers 54 on each side of the pad extending through
slits 55 in the web 41, as in FIG. 7. Finger pad 53 is formed of a
nonmetallic material, such as plastic, since it is the outermost
part when the leg is folded, as in FIG. 5, and will minimize damage
to other articles when the table is stored, as with the top T on
edge.
In further accordance with this invention, the lock bar is
resiliently urged into the sockets 51, as by a U-shaped hairpin
spring 56, which is mounted within the bracket between the bracket
web 33 and the lock bar, as in FIGS. 3 and 4. This spring, shown
also in FIGS. 10 and 11, may be formed as a symmetrical unit having
a pair of legs, as shown, extending from each side of an arched
crotch 57 and each extended end being curled to form a hinge loop
58 and a foot 59 extending from each loop 58 in a direction
perpendicular to the legs. The hinge loops 58 are held between the
flanges 34 of the bracket B by a retainer pin 60 carried between
the flanges 34 in holes 61 adjacent to the web 33 and with the feet
59 lying upon the web surface. Accordingly, the spring may be
folded inwardly towards the feet 59 and will thus be biased
resiliently, with each leg pressing against the base side 62 of the
lock bar, to thereby urge the lock bar into the socket 51. The
length of the spring legs is such that the lock bar 43 can be moved
to the inward end of slot 50, as in FIG. 5, while the arch crotch
57 will clear the end of the leg L during movement between the
positions of FIGS. 4 and 5.
The use of the present invention is very simple and is inherently
described above. The user of a table, having its legs so mounted
upon the improved folding connectors, can extend the legs by simply
pulling them to the extended position, since the pressure of the
spring will secure the lock bar 43 in the respective sockets 51.
When a table leg is to be retracted to lie against the underside of
the table, the finger pad 53 on the strut S may be pressed, as by
finger tip pressure, to push the lock bar 43 out of its socket 51
and thereafter, the table leg easily swings to the retracted
position, with the lock bar 32 moving in the slot 50.
Certain simple modifications can be made to vary the basic features
of the connector herein described. For example, FIGS. 14 and 15
show a lock bar 43' of a type which has each end turned to provide
a circular head 65 and a circular slot 66, to receive a snap-on
lock pin 67, such as shown at one end of the bar in FIG. 14. This
arrangement may be used in lieu of the lock ring 48 heretofore
described. Lock bar 43' is also rectangular in cross section and,
when used, the sides 52 of slot 51 should be slightly modified so
as to be parallel, rather than diverging.
In FIG. 16 is shown a base plate P' which is slightly modified from
the structure heretofore described, in order to fit a wooden frame
F' of a square cornered table T'. In a table of this type, the top
20' is ordinarily secured by adhesive to the frame, with the frame
F' being rectangular and different components being fitted together
at a moderately sharp corner 24'. To modify the baseplate P' for
use with frame F', the outer edges 25' and outer corner 26' of the
plate are shaped to lie between the undersurface of the table panel
20' and the frame F'. Accordingly, it is contemplated that frame F'
will be rabbeted or otherwise slotted to receive the edges of plate
P'. The flange 27' is formed substantially the same as flange 27
heretofore described, with a cutout 28 at and adjacent to the inner
corner 29. In the construction described, however, where the frame
F' is made of wood or similar material, it is convenient to provide
a tab 69 at each end of the flange 27' which abuts against the side
of the frame F' and which is affixed thereto in any suitable
manner, as with a wood screw or rivet. The modified baseplate P' is
provided with an inclined pad 32, if it is desired to tilt the leg
at a small angle from a normal to the table top, the same as
heretofore described.
We have now described our invention in considerable detail;
however, it is obvious that others skilled in the art can build and
devise alternate and equivalent constructions which are
nevertheless within the spirit and scope of our invention.
* * * * *